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An increase in the substrate concentration increases the rate of reaction initially as more enzyme-substrate collisions occur, resultng in more enzyme-substrate complexes being...

When an action potential arrives at the end of a presynaptic neurone, it causes the uptake of calcium ions through ion channels in the wall of the synapse. This influx of calcium ions causes vessicles of ...

An action potential arrives at the synapse, triggering Ca2+ channels to open. This in turn triggers vesicles holding neurotransmitter to fuse with the presynaptic membrane, releasing the neurotransmitter ...

There are two main muscle filaments in muscle fibres: Actin and myosin filaments. Actin filaments are thin and have binding sites for the globular heads ...

Sex linkage refers to when certain alleles affect one gender more than the other. Men tend to be affected by some genetic disorders more than women. This is because some alleles for genetic disorders are ...